| 摘要 |
PURPOSE:To obtain the timing signals for various types of digital apparatus through a simple constitution, by switching the CR time constant of the CR oscillator based on the output of the decoder. CONSTITUTION:The oscillation frequency is decided for pulse oscillator 1 with the time constant of CR. The pulse outputs of oscillator 1 are counted by N-notation counter (N: optional integer) and then led to decoder 3 to receive the serial-parallel conversion. The output of decoder 3 is supplied to switch circuits SW1-SWN, and the CR time constant of oscillator 1 is switched based on the output of decoder 3. As a result, the timing signals can be obtained for various types of digital apparatus through a simple constitution. |
